Looking for clues to birth, immigration to US before 1849, and marriage (before or after immigration) of Patrick O'Callahan/Callahan and Margaret Sweeney - parents of Johanna, born in New York state in 1849.

Death certificate says that Patrick's parents were Denis and Ellen.

Family moved to Holyoke,Massachusetts, by 1852 (birth of Eugene); then Lemonweir, Wisconsin, in 1855 where John, Joseph, Willliam and Dennis were born; then Waseca County, Minnesota in 1865.

Patrick died in 1881.